Hi Ketan,
1.How many incoming calls are expected in an hour (Approx.)?
During peak hours as well as dull hours?
2. What is the expected duration of each call? (average in minutes)
3. How much hold time for the outside caller is acceptable?
This data will be useful in making a design for your call center. Then I can tell you the complete cost of initial setup. If you want, I can specify each and every component in detail.
Regards,
Tushar